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/************************************************************************
*
* Copyright (C) 2017-2024 IRCAD France
* Copyright (C) 2017-2020 IHU Strasbourg
*
* This file is part of Sight.
*
* Sight is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sight is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
// cspell:ignore NOLINTNEXTLINE
#include "image.hpp"
#include "io/opencv/type.hpp"
#include <data/array.hpp>
namespace sight::io::opencv
{
//------------------------------------------------------------------------------
static cv::Mat to_cv(const data::image::csptr& _image, bool _copy)
{
const auto image_type = _image->type();
const auto image_comp = _image->num_components();
const auto cv_type = io::opencv::type::to_cv(image_type, image_comp);
const auto dump_lock = _image->dump_lock();
cv::Mat cv_image;
if(_image->buffer() != nullptr)
{
const auto image_size = _image->size();
std::vector<int> cv_size;
for(std::size_t i = 0 ; i < _image->num_dimensions() ; ++i)
{
cv_size.push_back(static_cast<int>(image_size[i]));
}
if(cv_size.size() == 1)
{
// If we have a single row, we want to initialize the cv::Math with (1, N) since it takes (rows,cols)
cv_size.push_back(1);
}
// Reverse from (w,h,d) to (d,h,w) because OpenCV uses a row major format
std::reverse(cv_size.begin(), cv_size.end());
if(_copy)
{
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
cv::Mat mat = cv::Mat(cv_size, cv_type, const_cast<void*>(_image->buffer()));
cv_image = mat.clone();
}
else
{
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
cv_image = cv::Mat(cv_size, cv_type, const_cast<void*>(_image->buffer()));
}
}
return cv_image;
}
//------------------------------------------------------------------------------
cv::Mat image::move_to_cv(data::image::sptr& _image)
{
return to_cv(_image, false);
}
//------------------------------------------------------------------------------
cv::Mat image::move_to_cv(const data::image::csptr& _image)
{
return to_cv(_image, false);
}
//------------------------------------------------------------------------------
void image::copy_from_cv(data::image& _image, const cv::Mat& _cv_image)
{
const auto prev_image_type = _image.type();
const auto prev_image_comp = _image.num_components();
const auto image_format = io::opencv::type::from_cv(_cv_image.type());
const auto image_type = image_format.first;
const auto image_comp = image_format.second;
SIGHT_ASSERT("Number of components should be between 1 and 4", image_comp >= 1 && image_comp <= 4);
SIGHT_ASSERT("Number of dimension should be between 1 and 3", _cv_image.dims >= 1 && _cv_image.dims <= 3);
data::image::size_t image_size = {0, 0, 0};
if(_cv_image.dims == 1)
{
image_size[0] = std::size_t(_cv_image.size[0]);
}
else if(_cv_image.dims == 2 && _cv_image.rows == 1)
{
// This means this is actually a 1D image so remove the first dimension (==1)
image_size[0] = std::size_t(_cv_image.size[1]);
image_size[1] = 0;
}
else if(_cv_image.dims == 2)
{
image_size[0] = std::size_t(_cv_image.size[1]);
image_size[1] = std::size_t(_cv_image.size[0]);
}
else // 3D
{
image_size[0] = std::size_t(_cv_image.size[2]);
image_size[1] = std::size_t(_cv_image.size[1]);
image_size[2] = std::size_t(_cv_image.size[0]);
}
const auto prev_image_size = _image.size();
if(prev_image_comp != image_comp || prev_image_type != image_type || image_size != prev_image_size)
{
enum data::image::pixel_format_t format = data::image::pixel_format_t::gray_scale;
switch(image_comp)
{
case 1:
format = data::image::pixel_format_t::gray_scale;
break;
case 2:
format = data::image::pixel_format_t::rg;
break;
case 3:
format = data::image::pixel_format_t::rgb;
break;
case 4:
format = data::image::pixel_format_t::rgba;
break;
default:
SIGHT_FATAL("Unhandled OpenCV format");
}
_image.resize(image_size, image_type, format);
}
const auto dump_lock = _image.dump_lock();
SIGHT_ASSERT("Empty image buffer", _image.allocated_size_in_bytes() > 0);
auto buffer = _image.begin<std::uint8_t>();
std::copy(_cv_image.data, _cv_image.data + _image.size_in_bytes(), buffer);
}
//------------------------------------------------------------------------------
cv::Mat image::copy_to_cv(const data::image::csptr& _image)
{
return to_cv(_image, true);
}
//------------------------------------------------------------------------------
} //namespace sight::io::opencv
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